<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Response响应</title>
</head>
<body>
    四种响应方式：
    <ol>
        <li>响应：字符串</li>
        <li>响应：JSON</li>
        <li>响应：渲染模版</li>
        <li>响应：自定义Response对象</li>
    </ol>
    

</body>
</html>